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MAINTENANCE
English – 27
Carburetor
Function
• The carburetor governs the engine’s speed via the
throttle control. Air and fuel are mixed in the carburetor.
• Setting the carburettor involves adapting the engine to
suit local conditions, e.g. climate, altitude and the petrol.
Basic setting
The basic carburetor settings are adjusted during testing at
the factory.
CAUTION! For optimum adjustment of the carburettor,
contact a qualified dealer/service workshop that has a
revolution counter at their disposal.
Adjusting the idle speed (T)
Check that the air filter is clean. When the idle speed is
correct, the cutting attachment should not rotate. If
adjustment is required, close (turn clockwise) the idle
adjustment screw T, with the engine running, until the cutting
attachment starts to rotate. Open (turn anticlockwise) the
screw until the cutting attachment stops. The idle speed is
correctly set when the engine runs smoothly in all positions,
and there is a clear margin to the speed at which the cutting
attachment starts to rotate.
Muffler
CAUTION! Some mufflers are fitted with a catalytic
converter. See chapter on Technical data to see whether
your machine is fitted with a catalytic converter.
The muffler is designed to reduce the noise level and to
direct the exhaust gases away from the operator. The
exhaust gases are hot and can contain sparks, which may
cause fire if directed against dry and combustible material.
The muffler on your machine is equipped with a spark
arrestor screen, this should be cleaned regularly. A blocked
screen will cause the engine to overheat and may lead to
serious damage.
CAUTION! Never use a machine with a defective muffler.
!
WARNING! The complete clutch cover and
shaft must be fitted before the machine is
started, otherwise the clutch can come
loose and cause personal injury.
!
WARNING! If the idle speed cannot be
adjusted so that the cutting attachment
stops, contact your dealer/service
workshop. Do not use the machine until it
has been correctly adjusted or repaired.
!
WARNING! Mufflers fitted with catalytic
converters get very hot during use and
remain so for some time after stopping.
This also applies at idle speed. Contact can
result in burns to the skin. Remember the
risk of fire!